Soybean cultivar A3732

ABSTRACT

A novel soybean cultivar, designated A3732, is disclosed. The invention relates to the seeds of soybean cultivar A3732, to the plants of soybean A3732 and to methods for producing a soybean plant produced by crossing the cultivar A3732 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar A3732 with another soybean cultivar.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinctive soybean cultivar,designated A3732. There are numerous steps in the development of anynovel, desirable plant germplasm. Plant breeding begins with theanalysis and definition of problems and weaknesses of the currentgermplasm, the establishment of program goals, and the definition ofspecific breeding objectives. The next step is selection of germplasmthat possess the traits to meet the program goals. The goal is tocombine in a single variety an improved combination of desirable traitsfrom the parental germplasm. These important traits may include higherseed yield, resistance to diseases and insects, better stems and roots,tolerance to drought and heat, and better agronomic quality.

Choice of breeding or selection methods depends on the mode of plantreproduction, the heritability of the trait(s) being improved, and thetype of cultivar used commercially (e.g., F₁ hybrid cultivar, purelinecultivar, etc.). For highly heritable traits, a choice of superiorindividual plants evaluated at a single location will be effective,whereas for traits with low heritability, selection should be based onmean values obtained from replicated evaluations of families of relatedplants. Popular selection methods commonly include pedigree selection,modified pedigree selection, mass selection, and recurrent selection.

The complexity of inheritance influences choice of the breeding method.Backcross breeding is used to transfer one or a few favorable genes fora highly heritable trait into a desirable cultivar. This approach hasbeen used extensively for breeding disease-resistant cultivars. Variousrecurrent selection techniques are used to improve quantitativelyinherited traits controlled by numerous genes. The use of recurrentselection in self-pollinating crops depends on the ease of pollination,the frequency of successful hybrids from each pollination, and thenumber of hybrid offspring from each successful cross.

Each breeding program should include a periodic, objective evaluation ofthe efficiency of the breeding procedure. Evaluation criteria varydepending on the goal and objectives, but should include gain fromselection per year based on comparisons lo to an appropriate standard,overall value of the advanced breeding lines, and number of successfulcultivars produced per unit of input (e.g., per year, per dollarexpended, etc.).

Promising advanced breeding lines are thoroughly tested and compared toappropriate standards in environments representative of the commercialtarget area(s) for three or more years. The best lines are candidatesfor new commercial cultivars; those still deficient in a few traits maybe used as parents to produce new populations for further selection.

These processes, which lead to the final step of marketing anddistribution, usually take from eight to 12 years from the time thefirst cross is made. Therefore, development of new cultivars is atime-consuming process that requires precise forward planning, efficientuse of resources, and a minimum of changes in direction.

A most difficult task is the identification of individuals that aregenetically superior, because for most traits the true genotypic valueis masked by other confounding plant traits or environmental factors.One method of identifying a superior plant is to observe its performancerelative to other experimental plants and to a widely grown standardcultivar. If a single observation is inconclusive, replicatedobservations provide a better estimate of its genetic worth.

The goal of plant breeding is to develop new, unique and superiorsoybean cultivars and hybrids. The breeder initially selects and crossestwo or more parental lines, followed by repeated selfing and selection,producing many new genetic combinations. The breeder can theoreticallygenerate billions of different genetic combinations via crossing,selling and mutations. The breeder has no direct control at the cellularlevel. Therefore, two breeders will never develop the same line, or evenvery similar lines, having the same soybean traits.

Each year, the plant breeder selects the germplasm to advance to thenext generation. This germplasm is grown under unique and differentgeographical, climatic and soil conditions, and further selections arethen made, during and at the end of the growing season. The cultivarswhich are developed are unpredictable. This unpredictability is becausethe breeder's selection occurs in unique environments, with no controlat the DNA level (using conventional breeding procedures), and withmillions of different possible genetic combinations being generated. Abreeder of ordinary skill in the art cannot predict the final resultinglines he develops, except possibly in a very gross and general fashion.The same breeder cannot produce the same cultivar twice by using theexact same original parents and the same selection techniques. Thisunpredictability results in the expenditure of large amounts of researchmonies to develop superior new soybean cultivars.

The development of new soybean cultivars requires the development andselection of soybean varieties, the crossing of these varieties andselection of superior hybrid crosses. The hybrid seed is produced bymanual crosses between selected male-fertile parents or by using malesterility systems. These hybrids are selected for certain single genetraits such as pod color, flower color, pubescence color or herbicideresistance which indicate that the seed is truly a hybrid. Additionaldata on parental lines as well as the phenotype of the hybrid influencethe breeder's decision whether to continue with the specific hybridcross.

Pedigree breeding and recurrent selection breeding methods are used todevelop cultivars from breeding populations. Breeding programs combinedesirable traits from two or more cultivars or various broad-basedsources into breeding pools from which cultivars are developed byselfing and selection of desired phenotypes. The new cultivars areevaluated to determine which have commercial potential.

Pedigree breeding is used commonly for the improvement ofself-pollinating crops. Two parents which possess favorable,complementary traits are crossed to produce an F₁. An F₂ population isproduced by selfing one or several F₁ 's. Selection of the bestindividuals may begin in the F₂ population; then, beginning in the F₃,the best individuals in the best families are selected. Replicatedtesting of families can begin in the F₄ generation to improve theeffectiveness of selection for traits with low heritability. At anadvanced stage of inbreeding (i.e., F₆ and F₇), the best lines ormixtures of phenotypically similar lines are tested for potentialrelease as new cultivars.

Mass and recurrent selections can be used to improve populations ofeither self- or cross-pollinating crops. A genetically variablepopulation of heterozygous individuals is either identified or createdby intercrossing several different parents. The best plants are selectedbased on individual superiority, outstanding progeny, or excellentcombining ability. The selected plants are intercrossed to produce a newpopulation in which further cycles of selection are continued.

Backcross breeding has been used to transfer genes for a simplyinherited, highly heritable trait into a desirable homozygous cultivaror inbred line which is the recurrent parent. The source of the trait tobe transferred is called the donor parent. The resulting plant isexpected to have the attributes of the recurrent parent (e.g., cultivar)and the desirable trait transferred from the donor parent. After theinitial cross, individuals possessing the phenotype of the donor parentare selected and repeatedly crossed (backcrossed) to the recurrentparent. The resulting plant is expected to have the attributes of therecurrent parent (e.g., cultivar) and the desirable trait transferredfrom the donor parent.

The single-seed descent procedure in the strict sense refers to plantinga segregating population, harvesting a sample of one seed per plant, andusing the one-seed sample to plant the next generation. When thepopulation has been advanced from the F₂ to the desired level ofinbreeding, the plants from which lines are derived will each trace todifferent F₂ individuals. The number of plants in a population declineseach generation due to failure of some seeds to germinate or some plantsto produce at least one seed. As a result, not all of the F₂ plantsoriginally sampled in the population will be represented by a progenywhen generation advance is completed.

In a multiple-seed procedure, soybean breeders commonly harvest one ormore pods from each plant in a population and thresh them together toform a bulk. Part of the bulk is used to plant the next generation andpart is put in reserve. The procedure has been referred to as modifiedsingle-seed descent or the pod-bulk technique.

The multiple-seed procedure has been used to save labor at harvest. Itis considerably faster to thresh pods with a machine than to remove oneseed from each by hand for the single-seed procedure. The multiple-seedprocedure also makes it possible to plant the same number of seeds of apopulation each generation of inbreeding. Enough seeds are harvested tomake up for those plants that did not germinate or produce seed.

Descriptions of other breeding methods that are commonly used fordifferent traits and crops can be found in one of several referencebooks (e.g., Allard, 1960; Simmonds, 1979; Sneep et al., 1979; Fehr,1987).

Proper testing should detect any major faults and establish the level ofsuperiority or improvement over current cultivars. In addition toshowing superior performance, there must be a demand for a new cultivarthat is compatible with industry standards or which creates a newmarket. The introduction of a new cultivar will incur additional coststo the seed producer, the grower, processor and consumer; for specialadvertising and marketing, altered seed and commercial productionpractices, and new product utilization. The testing preceding release ofa new cultivar should take into consideration research and developmentcosts as well as technical superiority of the final cultivar. Forseed-propagated cultivars, it must be feasible to produce seed easilyand economically.

Soybean, Glycine max (L), is an important and valuable field crop. Thus,a continuing goal of plant breeders is to develop stable, high yieldingsoybean cultivars that are agronomically sound. The reasons for thisgoal are obviously to maximize the amount of grain produced on the landused and to supply food for both animals and humans. To accomplish thisgoal, the soybean breeder must select and develop soybean plants thathave the traits that result in superior cultivars.

SUMMARY OF THE INVENTION

According to the invention, there is provided a novel soybean cultivar,designated A3732. This invention thus relates to the seeds of soybeancultivar A3732, to the plants of soybean A3732 and to methods forproducing a soybean plant produced by crossing the soybean A3732 withitself or another soybean line.

DEFINITIONS

In the description and tables which follow, a number of terms are used.In order to provide a clear and consistent understanding of thespecification and claims, including the scope to be given such terms,the following definitions are provided:

Maturity Date. Plants are considered mature when 95% of the pods havereached their mature color.

Seed Yield (Bushels/Acre). The yield in bushels/acre is the actual yieldof the grain at harvest.

Lodging Resistance. Lodging is rated on a scale of 1 to 5. A score of 1indicates erect plants. A score of 2.5 indicates plants are leaning at a45° angle in relation to the ground and a score of 5 indicates plantsare laying on the ground.

Phytophthora Tolerance. Tolerance to Phytophthora root rot is rated on ascale of 1 to 5, with a score of 1 being the best or highest toleranceranging down to a score of 5 which indicates the plants have notolerance to Phytophthora.

Emergence. This score indicates the ability of the seed to emerge whenplanted 3" deep in sand and with a controlled temperature of 25° C. Thenumber of plants that emerge each day are counted. Based on this data,each genotype is given a 1 to 5 score based on its rate of emergence andpercent of emergence. A score of 1 indicates an excellent rate andpercent of emergence, an intermediate score of 2.5 indicates averageratings and a 5 score indicates a very poor rate and percent ofemergence.

Iron-Deficiency Chlorosis. Plants are scored 1 to 5 based on visualobservations. A score of 1 means no stunting of the plants or yellowingof the leaves and a score of 5 indicates the plants are dead or dyingcaused by iron-deficiency chlorosis, a score of 2.5 means plants haveintermediate health with some leaf yellowing.

Brown Stem Rot. This is a visual disease score from 1 to 5 comparing allgenotypes in a given test. The score is based on leaf symptoms ofyellowing and necrosis caused by brown stem rot. A score of 1 indicatesno symptoms. Visual scores range to a score of 5 which indicates severesymptoms of leaf yellowing and necrosis.

Shattering. The amount of pod dehiscence prior to harvest. Poddehiscence involves seeds falling from the pods to the soil. This is avisual score from 1 to 5 comparing all genotypes within a given test. Ascore of 1 means pods have not opened and no seeds have fallen out. Ascore of 2.5 indicates approximately 50% of the pods have opened, withseeds falling to the ground and a score of 5 indicates 100% of the podsare opened.

Plant Height. Plant height is taken from the top of soil to top node ofthe plant and is measured in inches.

DETAILED DESCRIPTION OF THE INVENTION

Soybean cultivar A3732 has superior characteristics and was developedfrom the cross A3242×Flyer. F₂ and F₃ plants were advanced by a modifiedpedigree selection. In 1990, F₄ progeny rows were grown in Illinois andselected based on agronomic characteristics. The highest yielding lineswere retained for additional testing at two locations in 1991. Furthertesting and selections were conducted in 1992 at nine locations, at 20locations in 1993 and at 25 locations in 1994. A3732 is a late maturitygroup III variety with resistance to races 3 and 14 of Soybean CystNematode. It has no major gene for Phytophthora Root Rot. It is animproved plant type, with better lodging resistance and is adaptedacross all row widths and soil types.

A3732 has excellent yield potential and is adapted across the mid GroupIII growing area, especially where Soybean Cyst Nematode is present.This includes northeast Kansas, central Missouri, central and southernIllinois as well as central and southern Indiana.

Some of the criteria used to select in various generations include: seedyield, lodging resistance, emergence, disease tolerance, maturity, lateseason plant intactness, plant height and shattering resistance.

The cultivar has shown uniformity and stability for all traits, asdescribed in the following variety description information. It has beenself-pollinated a sufficient number of generations, with carefulattention to uniformity of plant type to ensure homozygosity andphenotypic stability. The line has been increased with continuedobservation for uniformity. No variant traits have been observed or areexpected in A3732.

Soybean cultivar A3732 has the following morphologic and othercharacteristics (based primarily on data collected at Stonington, Ill.):

    __________________________________________________________________________    VARIETY DESCRIPTION INFORMATION                                               __________________________________________________________________________      Seed Shape: Spherical Flattened (L/W ratio > 1.2; L/T ratio = < 1.2)          Seed Coat Color: (Mature Seed) - Yellow                                       Seed Coat Luster: (Mature Hand Shelled Seed) - Shiny                          Seed Size: 14 grams per 100 seeds                                             Hilum Color: (Mature Seed) - Black                                            Cotyledon Color: (Mature Seed) - Yellow                                       Seed Protein Peroxidase Activity: High                                        Seed Protein Electrophoretic Band: Type B (SP1.sup.b)                         Hypocotyl Color: Light purple below cotyledons                              10.                                                                             Leaflet Shape: Ovate                                                          Leaflet Size: Medium                                                          Leaf Color: Medium Green                                                      Flower Color: Purple                                                          Pod Color: Tan                                                                Plant Pubescence Color: Brown                                                 Plant Types: Intermediate                                                     Plant Habit: Indeterminate                                                    Maturity Group: III                                                           Disease Reaction:                                                                      Phytophthora Rot:                                                                       Race 1 - Susceptible                                                          Race 3 - Susceptible                                                          Race 4 - Susceptible                                                Soybean Cyst Nematode ( Heterodera glycines)                                            Race 1 - Susceptible                                                          Race 3 - Resistant                                                            Race 14 - Susceptible                                    20.                                                                             Physiological Responses: Iron Chlorosis on Calcareous Soil:                   Susceptible                                                                   Plant Lodging Score: 1.8                                                      Plant Height: 101 cm.                                                         Seed Content -                                                                         % Protein:                                                                              40.7                                                                % Oil:    19.2                                                     __________________________________________________________________________

This invention is also directed to methods for producing a soybean plantby crossing a first parent soybean plant with a second parent soybeanplant, wherein the first or second soybean plant is the soybean plantfrom the line A3732. Further, both first and second parent soybeanplants may be from the cultivar A3732. Therefore, any methods using thecultivar A3732 are part of this invention: selfing, backcrosses, hybridbreeding, and crosses to populations. Any plants produced using cultivarA3732 as a parent are within the scope of this invention. As usedherein, the term "plant" includes plant cells, plant protoplasts, plantcells of tissue culture from which soybean plants can be regenerated,plant calli, plant clumps, and plant cells that are intact in plants orparts of plants, such as pollen, flowers, seeds, pods, leaves, stems,and the like. Thus, another aspect of this invention is to provide forcells which upon growth and differentiation produce the cultivar A3732.

The cultivar A3732 is similar to A3242. While similar, there arenumerous differences. A3732 has tawny pubescence while A3242 has graypubescence. A3732 has black hilum color and A3242 has imperfect blackhilum color. A3732 is four days later in maturity than A3242.

TABLES

In the tables that follows, the traits and characteristics of soybeancultivar A3732 are compared to several competing varieties of commercialsoybeans of similar maturity. In these tables, column 1 shows theCompetitor Variety. Column 2 and 3 indicate the number of tests andyears of testing. Column 4, 5 and 6 indicate the yield in bushels/acrefor the instant invention, the Competitor Variety (in column 1) and thedifference, respectively. Column 7 and 8 indicate the days of maturityfor the instant invention and Competitor Variety, respectively andcolumn 9 and 10 show the lodging score for the instant invention and theCompetitor Variety respectively. Lodging scores are rated 1 =Best and 5=Worst.

                                      TABLE 1                                     __________________________________________________________________________    ASGROW RESEARCH TRIAL - HEAD TO HEAD COMPARISON                               ASGROW A3732 vs. LISTED COMPETITORS                                           1992, 1993, 1994                                                              ALL LOCATIONS                                                                 Competitor                                                                    Variety Number Yield, Bushel/Acre                                                                        Maturity                                                                              Lodging                                    (Other) Tests                                                                            Years                                                                             A3732                                                                             Other                                                                             Diff.                                                                             A3732                                                                             Other                                                                             A3732                                                                             Other                                  __________________________________________________________________________    Asgrow A3134                                                                          25 1   66.6                                                                              63.2                                                                              3.4 22.1                                                                              16.5                                                                              1.7 1.7                                    Asgrow A3313                                                                          16 1   73.5                                                                              71.6                                                                              1.9 22.5                                                                              18.2                                                                              2.0 1.6                                    Asgrow A3322                                                                          27 2   63.6                                                                              59.6                                                                              4.0 26.2                                                                              22.1                                                                              2.0 1.7                                    Asgrow A3431                                                                          52 3   65.0                                                                              64.5                                                                               .5 24.0                                                                              21.2                                                                              1.9 1.4                                    Asgrow A3510                                                                          52 3   65.0                                                                              63.7                                                                              1.3 24.0                                                                              22.1                                                                              1.9 1.6                                    Asgrow A3733                                                                          39 2   64.4                                                                              60.0                                                                              4.4 23.4                                                                              24.6                                                                              1.7 1.4                                    Asgrow A3834                                                                          39 2   64.4                                                                              67.2                                                                              -2.9                                                                              23.5                                                                              25.5                                                                              1.8 1.5                                    Asgrow A3935                                                                          41 2   64.5                                                                              62.5                                                                              2.1 23.4                                                                              25.3                                                                              1.8 2.0                                    Asgrow A4045                                                                          39 2   64.4                                                                              62.8                                                                              1.6 23.5                                                                              25.8                                                                              1.8 2.2                                    Asgrow CI3948                                                                         30 2   65.8                                                                              66.9                                                                              -1.1                                                                              23.3                                                                              26.3                                                                              1.8 1.6                                    Depf CX394                                                                            21 1   66.3                                                                              60.0                                                                              6.2 21.5                                                                              22.2                                                                              1.7 1.6                                    Pioneer 9392                                                                          37 2   64.6                                                                              63.2                                                                              1.4 23.8                                                                              22.6                                                                              1.7 1.6                                    __________________________________________________________________________

                                      TABLE 2                                     __________________________________________________________________________    ASGROW RESEARCH TRIAL - HEAD TO HEAD COMPARISON                               ASGROW A3732 vs. LISTED COMPETITORS                                           1994                                                                          ALL LOCATIONS                                                                 Competitor                                                                    Variety Number Yield, Bushel/Acre                                                                        Maturity                                                                              Lodging                                    (Other) Tests                                                                            Years                                                                             A3732                                                                             Other                                                                             Diff.                                                                             A3732                                                                             Other                                                                             A3732                                                                             Other                                  __________________________________________________________________________    Asgrow A3134                                                                          25 1   66.6                                                                              63.2                                                                              3.4 22.1                                                                              16.5                                                                              1.7 1.7                                    Asgrow A3313                                                                          16 1   73.5                                                                              71.6                                                                              1.9 22.5                                                                              18.2                                                                              2.0 1.6                                    Asgrow A3431                                                                          25 1   66.3                                                                              65.6                                                                              .7  22.2                                                                              18.9                                                                              1.7 1.4                                    Asgrow A3510                                                                          25 1   66.3                                                                              64.3                                                                              2.0 22.2                                                                              19.5                                                                              1.7 1.5                                    Asgrow A3733                                                                          21 1   66.3                                                                              61.3                                                                              5.0 21.4                                                                              21.6                                                                              1.7 1.3                                    Asgrow A3834                                                                          21 1   66.3                                                                              69.1                                                                              -2.8                                                                              21.5                                                                              23.2                                                                              1.7 1.3                                    Asgrow A3935                                                                          23 1   66.2                                                                              63.8                                                                              2.4 21.9                                                                              23.1                                                                              1.7 2.0                                    Asgrow A4045                                                                          21 1   66.3                                                                              63.5                                                                              2.7 21.5                                                                              23.5                                                                              1.7 2.3                                    Asgrow CI3948                                                                         21 1   66.3                                                                              67.0                                                                              -.7 21.4                                                                              23.6                                                                              1.7 1.5                                    Depf CX394                                                                            21 1   66.3                                                                              60.0                                                                              6.2 21.5                                                                              22.2                                                                              1.7 1.6                                    Pioneer 9392                                                                          21 1   66.3                                                                              64.7                                                                              1.6 21.5                                                                              19.3                                                                              1.7 1.5                                    __________________________________________________________________________

                                      TABLE 3                                     __________________________________________________________________________    ASGROW RESEARCH TRIAL - HEAD TO HEAD COMPARISON                               ASGROW A3732 vs. LISTED COMPETITORS                                           1993                                                                          ALL LOCATIONS                                                                 Competitor                                                                    Variety Number Yield, Bushel/Acre                                                                        Maturity                                                                              Lodging                                    (Other) Tests                                                                            Years                                                                             A3732                                                                             Other                                                                             Diff.                                                                             A3732                                                                             Other                                                                             A3732                                                                             Other                                  __________________________________________________________________________    Asgrow A3322                                                                          18 1   62.1                                                                              58.9                                                                              3.2 26.2                                                                              22.4                                                                              1.8 1.6                                    Asgrow A3431                                                                          18 1   62.4                                                                              62.5                                                                              -.1 25.9                                                                              23.2                                                                              1.9 1.4                                    Asgrow A3510                                                                          18 1   62.4                                                                              61.5                                                                              .9  25.9                                                                              25.8                                                                              1.9 1.7                                    Asgrow A3733                                                                          18 1   62.1                                                                              65.1                                                                              3.7 26.2                                                                              28.9                                                                              1.8 1.6                                    Asgrow A3834                                                                          18 1   62.1                                                                              65.1                                                                              -3.0                                                                              26.2                                                                              28.9                                                                              1.8 1.7                                    Asgrow A3935                                                                          18 1   62.4                                                                              60.8                                                                              1.6 25.9                                                                              28.8                                                                              1.9 1.9                                    Asgrow A4045                                                                          18 1   62.1                                                                              61.9                                                                              .2  26.2                                                                              29.1                                                                              1.8 2.2                                    Asgrow CI3948                                                                          9 1   64.7                                                                              66.7                                                                              -2.0                                                                              27.6                                                                              32.7                                                                              2.1 1.6                                    Pioneer 9392                                                                          16 1   62.4                                                                              61.3                                                                              1.0 27.9                                                                              28.4                                                                              1.8 1.7                                    __________________________________________________________________________

                                      TABLE 4                                     __________________________________________________________________________    ASGROW RESEARCH TRIAL - HEAD TO HEAD COMPARISON                               ASGROW A3732 vs. LISTED COMPETITORS                                           1992                                                                          ALL LOCATIONS                                                                 Competitor                                                                    Variety Number Yield, Bushel/Acre                                                                        Maturity                                                                              Lodging                                    (Other) Tests                                                                            Years                                                                             A3732                                                                             Other                                                                             Diff.                                                                             A3732                                                                             Other                                                                             A3732                                                                             Other                                  __________________________________________________________________________    Asgrow A3322                                                                          9  1   66.7                                                                              61.1                                                                              5.6 26.2                                                                              21.5                                                                              2.3 1.8                                    Asgrow A3431                                                                          9  1   66.7                                                                              65.7                                                                              .9  26.2                                                                              24.5                                                                              2.3 1.7                                    Asgrow A3510                                                                          9  1   66.7                                                                              66.6                                                                              .0  26.2                                                                              23.3                                                                              2.3 1.7                                    __________________________________________________________________________

DEPOSIT INFORMATION

A deposit of the Asgrow Seed Company proprietary soybean cultivar A3732disclosed above and recited in the appended claims has been made withthe American Type Culture Collection (ATCC), 12301 Parklawn Drive,Rockville, Md., 20852. The date of deposit was Jun. 26, 1996. Thedeposit of 2,500 seeds were taken from the same deposit maintained byAsgrow Seed Company since prior to the filing date of this application.All restrictions upon the deposit have been removed, and the deposit isintended to meet all of the requirements of 37 C.F.R. §1.801-1.809. TheATCC accession number is ATCC 97635. The deposit will be maintained inthe depository for a period of 30 years, or 5 years after the lastrequest, or for the effective life of the patent, whichever is longer,and will be replaced as necessary during that period.

What is claimed is:
 1. A soybean seed designated A3732, deposited asATCC Accession Number
 97635. 2. A plant or plants of the soybeancultivar designated A3732 produced by growing the seed of claim
 1. 3.Pollen of the plant of claim
 2. 4. Ovule or ovules of the plant of claim2.
 5. A soybean plant with all of the physiological and morphologicalcharacteristics of the soybean plant of claim
 2. 6. Tissue culture ofthe plant of claim
 2. 7. A soybean plant regenerated from the tissueculture of claim 6 wherein the regenerated soybean plant has all of thephysiological and morphological characteristics of a plant grown from asoybean seed designated A3732.
 8. A method to produce a hybrid soybeanseed comprising the steps of:a) planting in pollinating proximity seedsof soybean cultivar A3732, wherein the seeds of soybean cultivar A3732are deposited as ATCC Accession Number 97635, and another soybeancultivar; b) cultivating soybean plants resulting from said seeds untilsaid plants bear flowers; c) emasculating the male flowers of the plantsof either one or the other soybean cultivar; d) inducing crosspollination to occur between said soybean cultivars; and, e) harvestingseeds produced on said emasculated plants of the cultivar line.
 9. Afirst generation (F₁) hybrid soybean plant produced by growing saidhybrid soybean seed of claim 8.